Obsolete Rifle Rounds with Very Famous Offspring

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Dr T

Dr T

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The threads on Cartridges that should (die, live forever, be loved against all reason, be hated unconditionally) forever got me thinking.

Many cartridges spring from interesting family trees, and it has intrigued me how some of the most popular rounds were derived from rounds that are now obsolete, or nearly so.

Several that come immediately to mind (and please correct me where I am mistaken):

38-55 => 30-30
6mm Lee Navy => 22 Swift
30-03 => 30-06 (sort of a stretch since the 30-03 was basically a prototype)
222 Remington Magnum => 223 Remington (Aka 5.56 NATO)
30 TC => 6.5 Creedmoor (I wonder about this since I have also seen the 6.5 CM described as a necked-up 250 Savage AI).

Any others?
 
Dr T said:
The
30-03 => 30-06 (sort of a stretch since the 30-03 was basically a prototype)
Click to expand...

The .30-03 was the official US Army cartridge for 3 years. I wouldn't call it a prototype. It would have served longer if the lightweight, spritzer trend had occured later. I would absolutely consider it the parent of the .30-06, and it's amazing that the rather conservative Ordnance Department acted as soon as it did.
 
6mm PPC and so in turn 6.5 Grendel have as parent the .220 Russian. But the .220 then has 7.62x39 as parent, hardly obsolete, so does it count?
 
7 mm Mauser , pretty much every cartridge with a .473 case head .
.30-03 govt , was chambered in several different rifles.
.44 Russian , even though its a revolver cartridge the inside lubricated bullet was a game changer .
not exactly obsolete , but the .375 H&H begat quite a family.
 
The 300 Winchester Magnum is "sort of" the offspring of the 308 Norma Magnum in the fact that, as it says in my Cartridges of the World book, "The 308 Norma Magnum, introduced in 1960, is nearly identical to the 338 Winchester Magnum necked down. If that chambering had not been offered before Winchester was ready to produce its own 30-caliber Magnum, it is possible the company would simply have necked the 338 to 30-caliber."
In my opinion, the only reason Winchester came out with the 300 Winchester Magnum in 1963 was because they were too prideful to chamber their famous Model 70s for a 30-caliber Magnum that had already been invented by another company.
It doesn't make any difference - the 308 Norma Magnum is still better.:neener:
 
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.300 Whisper became .300 AAC BlackOut :) .300 H&H became .300 Weatherby by being fired in a Weatherby chamber. Same with my beloved .375 Weatherbys . ..22-250 Remingtom becomes .22-250 AI as many many other Ackley "wildcats " do also .30-30 became 25-35 and .219 Zipper and later 7mm Walters . .32-20 became .25-20 . mayny somewhat obscure cartridges of old morphed into others ect.
 
Nature Boy said:
.300 Savage => .308 Winchester
Click to expand...
Not really.

The T65 cartridge case was heavily modified in the rim, body taper, shoulder taper and length before it even became the FAT1 case. Then the FAT1 case when through 2 further variations (FAT1E1 and FAT1E2*) before coming out as the FAT1E3, which we now know as the .308 Winchester.

________
* Although the FAT1E2 was only a paper case, in that it only existed on paper.
 
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